Nice interactive that shows you how countries compare relative to many features and statistics. Can be done with world as whole, US or Japan. Includes such things as population, religion, causes of death, health, education, and more.
This blog post discusses Paper Rater. The free tool requires no registration and offers real-time, 24/7 analysis and detailed statistics about your work's originality, your word choice, grammar, spelling,style, word choice, readability. It suggests an overall grade, as well as opportunities for improving your writing.